Five observations of bivariate data produce the following results, denoted as (xi, yi)for i =1, 2, 3, 4, 5.

(13, 2.7) (13, 4.0) (18, 2.8) (23, 3.3) (23, 2.2)

[Σ x = 90, Σ y = 15.0, Σ x2 = 1720, Σ y2 = 46.86, Σ xy = 264.0.]

The regression line of y on x has gradient −0.06,

and its equation is y= 4.08 - 0.06x

The numbers e1, e2, e3, e4, e5 are defined by

ei = a +bxi −yi for i = 1, 2, 3, 4, 5.

The values of e1, e2 and e3 are 0.6, −0.7 and 0.2 respectively. Calculate the values of e4 and e5.

thanks